Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition
Publisher's version (útgefin grein) The isotopic composition of near surface (or planetary boundary layer) water vapor on the south coast of Iceland (63.83°N, 21.47°W) has been monitored in situ between November 2011 and April 2013. The calibrated data set documents seasonal variations in the r...
Published in: | Journal of Geophysical Research: Atmospheres |
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Language: | English |
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American Geophysical Union (AGU)
2015
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Online Access: | https://hdl.handle.net/20.500.11815/2027 https://doi.org/10.1002/2015JD023234 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/2027 2023-05-15T15:14:18+02:00 Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition Steen-Larsen, H. C. Sveinbjörnsdóttir, Árný Jonsson, Th. Ritter, F. Bonne, J.-L. Masson-Delmotte, V. Sodemann, H. Blunier, T. Dahl-Jensen, D. Vinther, B. M. Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2015-06-24 5757-5774 https://hdl.handle.net/20.500.11815/2027 https://doi.org/10.1002/2015JD023234 en eng American Geophysical Union (AGU) Journal of Geophysical Research: Atmospheres;120(12) Steen-Larsen, H. C., A. E. Sveinbjörnsdottir, Th. Jonsson, F. Ritter, J.-L. Bonne, V. Masson-Delmotte, H. Sodemann, T. Blunier, D. Dahl-Jensen, and B. M. Vinther (2015), Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition, J. Geophys. Res. Atmos., 120, 5757–5774, doi:10.1002/ 2015JD023234 2169-897X https://hdl.handle.net/20.500.11815/2027 Journal of Geophysical Research: Atmospheres doi:10.1002/2015JD023234 info:eu-repo/semantics/openAccess Water vapor Isotopes Marine boundary layer Evaporation Deuterium excess Vatnafræði Veðrahvolf Samsætur Norður-Atlantshaf info:eu-repo/semantics/article 2015 ftopinvisindi https://doi.org/20.500.11815/2027 https://doi.org/10.1002/2015JD023234 2022-11-18T06:51:59Z Publisher's version (útgefin grein) The isotopic composition of near surface (or planetary boundary layer) water vapor on the south coast of Iceland (63.83°N, 21.47°W) has been monitored in situ between November 2011 and April 2013. The calibrated data set documents seasonal variations in the relationship between δ18O and local humidity (ppmv) and between deuterium excess and δ18O. These seasonal variations are attributed to seasonal changes in atmospheric transport. A strong linear relationship is observed between deuterium excess and atmospheric relative humidity calculated at regional sea surface temperature. Surprisingly, we find a similar relationship between deuterium excess and relative humidity as observed in the Bermuda Islands. During days with low amount of isotopic depletion (more enriched values), our data significantly deviate from the global meteoric water line. This feature can be explained by a supply of an evaporative flux into the planetary boundary layer above the ocean, which we show using a 1‐d box model. Based on the close relationship identified between moisture origin and deuterium excess, we combine deuterium excess measurements performed in Iceland and south Greenland with moisture source diagnostics based on back trajectory calculations to establish the distribution of d‐excess moisture uptake values across the North Atlantic. We map high deuterium excess in the Arctic and low deuterium excess for vapor in the subtropics and midlatitudes. This confirms the role of North Atlantic water vapor isotopes as moisture origin tracers. To access the data used in this publication, please refer to H. C. Steen‐Larsen (hanschr@gfy.ku.dk). The work was supported by the Danish Council for Independent Research–Natural Sciences grant number 09–072689 and 10–092850, the Carlsberg Foundation, the AXA Research Fund, the University of Iceland Research Fund (no. 152229), and RannIs Infrastructure Fund 10/0244 and 120234–0031. We also acknowledge the MODIS mission scientists and associated NASA ... Article in Journal/Newspaper Arctic Greenland Iceland North Atlantic Opin vísindi (Iceland) Arctic Greenland Steen ENVELOPE(7.780,7.780,62.571,62.571) Journal of Geophysical Research: Atmospheres 120 12 5757 5774 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Water vapor Isotopes Marine boundary layer Evaporation Deuterium excess Vatnafræði Veðrahvolf Samsætur Norður-Atlantshaf |
spellingShingle |
Water vapor Isotopes Marine boundary layer Evaporation Deuterium excess Vatnafræði Veðrahvolf Samsætur Norður-Atlantshaf Steen-Larsen, H. C. Sveinbjörnsdóttir, Árný Jonsson, Th. Ritter, F. Bonne, J.-L. Masson-Delmotte, V. Sodemann, H. Blunier, T. Dahl-Jensen, D. Vinther, B. M. Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
topic_facet |
Water vapor Isotopes Marine boundary layer Evaporation Deuterium excess Vatnafræði Veðrahvolf Samsætur Norður-Atlantshaf |
description |
Publisher's version (útgefin grein) The isotopic composition of near surface (or planetary boundary layer) water vapor on the south coast of Iceland (63.83°N, 21.47°W) has been monitored in situ between November 2011 and April 2013. The calibrated data set documents seasonal variations in the relationship between δ18O and local humidity (ppmv) and between deuterium excess and δ18O. These seasonal variations are attributed to seasonal changes in atmospheric transport. A strong linear relationship is observed between deuterium excess and atmospheric relative humidity calculated at regional sea surface temperature. Surprisingly, we find a similar relationship between deuterium excess and relative humidity as observed in the Bermuda Islands. During days with low amount of isotopic depletion (more enriched values), our data significantly deviate from the global meteoric water line. This feature can be explained by a supply of an evaporative flux into the planetary boundary layer above the ocean, which we show using a 1‐d box model. Based on the close relationship identified between moisture origin and deuterium excess, we combine deuterium excess measurements performed in Iceland and south Greenland with moisture source diagnostics based on back trajectory calculations to establish the distribution of d‐excess moisture uptake values across the North Atlantic. We map high deuterium excess in the Arctic and low deuterium excess for vapor in the subtropics and midlatitudes. This confirms the role of North Atlantic water vapor isotopes as moisture origin tracers. To access the data used in this publication, please refer to H. C. Steen‐Larsen (hanschr@gfy.ku.dk). The work was supported by the Danish Council for Independent Research–Natural Sciences grant number 09–072689 and 10–092850, the Carlsberg Foundation, the AXA Research Fund, the University of Iceland Research Fund (no. 152229), and RannIs Infrastructure Fund 10/0244 and 120234–0031. We also acknowledge the MODIS mission scientists and associated NASA ... |
author2 |
Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Steen-Larsen, H. C. Sveinbjörnsdóttir, Árný Jonsson, Th. Ritter, F. Bonne, J.-L. Masson-Delmotte, V. Sodemann, H. Blunier, T. Dahl-Jensen, D. Vinther, B. M. |
author_facet |
Steen-Larsen, H. C. Sveinbjörnsdóttir, Árný Jonsson, Th. Ritter, F. Bonne, J.-L. Masson-Delmotte, V. Sodemann, H. Blunier, T. Dahl-Jensen, D. Vinther, B. M. |
author_sort |
Steen-Larsen, H. C. |
title |
Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
title_short |
Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
title_full |
Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
title_fullStr |
Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
title_full_unstemmed |
Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition |
title_sort |
moisture sources and synoptic to seasonal variability of north atlantic water vapor isotopic composition |
publisher |
American Geophysical Union (AGU) |
publishDate |
2015 |
url |
https://hdl.handle.net/20.500.11815/2027 https://doi.org/10.1002/2015JD023234 |
long_lat |
ENVELOPE(7.780,7.780,62.571,62.571) |
geographic |
Arctic Greenland Steen |
geographic_facet |
Arctic Greenland Steen |
genre |
Arctic Greenland Iceland North Atlantic |
genre_facet |
Arctic Greenland Iceland North Atlantic |
op_relation |
Journal of Geophysical Research: Atmospheres;120(12) Steen-Larsen, H. C., A. E. Sveinbjörnsdottir, Th. Jonsson, F. Ritter, J.-L. Bonne, V. Masson-Delmotte, H. Sodemann, T. Blunier, D. Dahl-Jensen, and B. M. Vinther (2015), Moisture sources and synoptic to seasonal variability of North Atlantic water vapor isotopic composition, J. Geophys. Res. Atmos., 120, 5757–5774, doi:10.1002/ 2015JD023234 2169-897X https://hdl.handle.net/20.500.11815/2027 Journal of Geophysical Research: Atmospheres doi:10.1002/2015JD023234 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/2027 https://doi.org/10.1002/2015JD023234 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
12 |
container_start_page |
5757 |
op_container_end_page |
5774 |
_version_ |
1766344772609376256 |